Rattanaprik, Vichien. “Comparision of Growth and Yield of Hybrid Coconut Varieties”. Thai Agricultural Research Journal 1, no. 2 (May 1, 1983): 106–109. accessed October 1, 2026. https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/245735.